Serial Peripheral Interface (SPI) is used for generic serial communication between AVR32 processors and peripherals.
The SPI is used to configure both the external DAC and the LCD screen. In addition the interface is routed to the dedicated SPI header, the general expansion headers and the PCI style expansion connector.
Please refer the datasheet for the AVR32 processor on you daughter board for a description of these signals
Signal | Description | Available on * |
---|---|---|
SPI_SCK | Serial clock | 1,2,3,4,5 |
SPI_MISO | Master In Slave Out | 1,3,4,5 |
SPI_MOSI | Master Out Slave In | 1,2,3,4,5 |
SPI_NPCS0 | Peripheral chip select/Slave select | 1,3,4 |
SPI_NPCS1 | Peripheral chip select | 2,3,4 |
SPI_NPCS2 | Peripheral chip select | 3,4 |